private void readInfo() {
try {
IImageMetadata metadata = Sanselan.getMetadata(source);
if (metadata instanceof JpegImageMetadata) {
JpegImageMetadata jpegMeta = (JpegImageMetadata) metadata;
TiffField exifDate = jpegMeta.findEXIFValue(TiffConstants.EXIF_TAG_DATE_TIME_ORIGINAL);
if (exifDate != null) {
String date = (String) exifDate.getValue();
dateTaken = parseExifDate(date);
successful = true;
}
}
} catch (ImageReadException e) {
} catch (IOException e) {
throw new RuntimeException("IO Error while getting metadata: " + e.getMessage(), e);
}
}
@Override
public Document handleDocument(IndexWriter indexWriter, IndexState state, File file)
throws Exception {
Document doc = super.handleDocument(indexWriter, state, file);
/* create/update document */
if (doc != null && file.length() > 0) {
/* ultra fast header analysis, with fileinputstream - too many filedescripor
* exeption on samba network */
try {
ImageInfo imageInfo = Sanselan.getImageInfo(file);
/* default image meta informations */
int w = imageInfo.getWidth();
int h = imageInfo.getHeight();
/* image width */
get(ImageWidthField.NAME).add(doc, w);
/* image height */
get(ImageHeightField.NAME).add(doc, h);
/* bits per pixel */
get(BitsPerPixelField.NAME).add(doc, imageInfo.getBitsPerPixel());
/* complete size */
get(PixelSizeField.NAME).add(doc, w * h);
/* image aspect ratio */
get(AspectRatioField.NAME).add(doc, w / (float) h);
/* try to extract metadata from jpeg files */
String mime = imageInfo.getMimeType();
/* override because they are different content types than extensions */
doc.removeFields(MimeTypeField.NAME);
get(MimeTypeField.NAME).add(doc, mime);
/* special jpeg handling */
if (mime != null && mime.equals("image/jpeg")) {
IImageMetadata metadata = Sanselan.getMetadata(file);
if (metadata instanceof JpegImageMetadata) {
JpegImageMetadata jpegMetadata = (JpegImageMetadata) metadata;
/* create date of the image */
TiffField field = jpegMetadata.findEXIFValue(ExifTagConstants.EXIF_TAG_CREATE_DATE);
if (field != null) {
Date date = DateUtil.parseEXIFFormat(field.getStringValue());
/* else unknown format */
if (date != null) {
/* override file last modified date */
doc.removeFields(LastModifiedField.NAME);
get(LastModifiedField.NAME).add(doc, date.getTime());
}
}
/* user comment tag */
field = jpegMetadata.findEXIFValue(ExifTagConstants.EXIF_TAG_USER_COMMENT);
if (field != null) {
get(CommentField.NAME).add(doc, field.getStringValue().trim());
}
/* make tag */
field = jpegMetadata.findEXIFValue(ExifTagConstants.EXIF_TAG_MAKE);
if (field != null) {
get(ExifMakeField.NAME).add(doc, field.getStringValue().trim());
}
/* model tag */
field = jpegMetadata.findEXIFValue(ExifTagConstants.EXIF_TAG_MODEL);
if (field != null) {
get(ExifModelField.NAME).add(doc, field.getStringValue().trim());
}
/* date time tag */
field = jpegMetadata.findEXIFValue(ExifTagConstants.EXIF_TAG_CREATE_DATE);
if (field != null) {
Date date = DateUtil.parseEXIFFormat(field.getStringValue());
/* else unknown format */
if (date != null) {
get(ExifDateField.NAME).add(doc, date.getTime());
}
}
/* try to find gps informations */
TiffImageMetadata exifMetadata = jpegMetadata.getExif();
if (exifMetadata != null) {
try {
TiffImageMetadata.GPSInfo gpsInfo = exifMetadata.getGPS();
if (null != gpsInfo) {
get(LatField.NAME).add(doc, gpsInfo.getLatitudeAsDegreesNorth());
get(LonField.NAME).add(doc, gpsInfo.getLongitudeAsDegreesEast());
// doc.add(new
// NumericField(FIELD_EXIF_GPS_IMG_DIRECTION, Field.Store.YES,
// true).setIntValue(gps.getRational(
//
// GpsDirectory.TAG_GPS_IMG_DIRECTION).intValue()));
//
// System.out.println(exifMetadata.findField(GPSTagConstants.GPS_TAG_GPS_IMG_DIRECTION));
}
} catch (ImageReadException e) {
}
}
}
}
/* run some classification */
if (classifyImage) {
int[] v = ImageUtil.analyzeRGB(file);
for (int i = 0; i < v.length; i++) {
doc.add(new IntPoint(COLORMEAN + i, v[i]));
}
}
} catch (Throwable e) {
/* only log */
log.log(Level.INFO, "can not extract image informations!", e);
}
}
return doc;
}